English problem .

also= 也;同样;而且;此外

If you will stay, I will also.
如果你留下来，我也要留下来

It's a pretty cat, also friendly.
这是只漂亮的猫，而且很友好

He is gentle, but he is also capable of fierce intellectual combat.
他很温和，但他却也能够进行激烈的斗智

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as = 同样地;被看作;象;当做;与...一样;当...之时;象;因为

The child sang as sweetly as a nightingale.
这孩子歌唱得同夜莺般婉转

large carnivores, as the bear or lion.
大的食肉动物，如熊或狮子

You are as sweet as sugar. The situation is not so bad as you suggest.
你甜如蜜。情形不如你说的那样糟

slipped on the ice as I ran home.
我跑回家时在冰上滑了一跤

He was so foolish as to lie.
他太傻才会撒谎

I received the same grade as you did.
我和你得分一样

acting as a mediator.
充当调解人

On this issue they thought as one.
在这个问题上，他们意见一致

这么说吧：
一方面这题目考察逻辑，crop failure基本就是一种自然现象（除非有人捣乱，像文化大革命的时候），一般都是由自然原因引起的，不存在“恶劣的天气是导致庄稼